Nanoparticles and Nanomaterials as Plant Biostimulants

Juárez‐Maldonado, Antonio; Ortega-Ortíz, Hortensia; Morales-Díaz, América Berenice; González-Morales, Susana; Morelos-Moreno, Álvaro; Fuente, Marcelino Cabrera-De la; Sandoval-Rangel, Alberto; Cadenas‐Pliego, Gregorio; Benavides-Mendoza, Adalberto

doi:10.20944/preprints201811.0129.v1

Cited by 8 publications

(11 citation statements)

References 83 publications

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“…Under intense reducing conditions, selenite can be further reduced to elemental Se (Se 0 ) or selenides (Se 2− ) (Hartikainen 2005 , Winkel et al 2015 ). Bacteria are reported to produce (nano)-sized Se(0) from selenate and selenite (Juárez-Maldonado et al 2019 ; Ni et al 2015 ), while Se in the − 2 oxidation state can exist as hydrogen selenide or metallic selenides, which are very insoluble forms of Se (Winkel et al 2015 ).…”

Section: Selenium Sources and Processes At The Plant-soil Interfacementioning

confidence: 99%

“…In very recent years, emerging cutting-edge technologies have advised the application of Se in the form of Se nanoparticles (SeNPs) in alternative to conventional Se fertilizers for enriching crops with Se-organic compounds (Babajani et al 2019 ; Juárez-Maldonado et al, 2019 ). SeNPs vary in shape and size and can be synthesized from Se salts precursors, mainly selenite and selenate, in the presence of reducing agents (e.g.…”

Section: How Can Crops Be Enriched With Selenium? Conventional and Nomentioning

confidence: 99%

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Selenium biofortification in the 21st century: status and challenges for healthy human nutrition

et al. 2020

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Background Selenium (Se) is an essential element for mammals and its deficiency in the diet is a global problem. Plants accumulate Se and thus represent a major source of Se to consumers. Agronomic biofortification intends to enrich crops with Se in order to secure its adequate supply by people. Scope The goal of this review is to report the present knowledge of the distribution and processes of Se in soil and at the plant-soil interface, and of Se behaviour inside the plant in terms of biofortification. It aims to unravel the Se metabolic pathways that affect the nutritional value of edible plant products, various Se biofortification strategies in challenging environments, as well as the impact of Se-enriched food on human health. Conclusions Agronomic biofortification and breeding are prevalent strategies for battling Se deficiency. Future research addresses nanosized Se biofortification, crop enrichment with multiple micronutrients, microbial-integrated agronomic biofortification, and optimization of Se biofortification in adverse conditions. Biofortified food of superior nutritional quality may be created, enriched with healthy Se-compounds, as well as several other valuable phytochemicals. Whether such a food source might be used as nutritional intervention for recently emerged coronavirus infections is a relevant question that deserves investigation.

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Section: Selenium Sources and Processes At The Plant-soil Interfacementioning

confidence: 99%

Section: How Can Crops Be Enriched With Selenium? Conventional and Nomentioning

confidence: 99%

Selenium biofortification in the 21st century: status and challenges for healthy human nutrition

et al. 2020

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“…), that provides long term safety to the cultivated crops against pathogens and help plants for increasing nutrient uptake and use efficiency to gain optimum yields. Nanoparticles and nanomaterials-based biostimulants are considered to be a novel category of biostimulants and recently been reported by Juárez-Maldonado et al (2019). Similarly, green synthesized silver nanoparticles (AgNPs) by naturally occurring bio-active components is also considered to be a novel category of biostimulants (Tripathi and Pandey-Rai, 2021).…”

Section: Other Important Beneficial Microbes and Their Consortia As Biostimulantsmentioning

confidence: 99%

Prospects for Abiotic Stress Tolerance in Crops Utilizing Phyto- and Bio-Stimulants

Rai

Pandey

Sarma

2021

Front. Sustain. Food Syst.

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Environmental stressors such as salinity, drought, high temperature, high rainfall, etc. have already demonstrated the negative impacts on plant growth and development and thereby limiting productivity of the crops. Therefore, in the time to come, more sustainable efforts are required in agricultural practices to ensure food production and security under such adverse environmental conditions. A most promising and eco-friendly way to achieve this goal would be to apply biostimulants to address the environmental concerns. Non-microbial biostimulants such as humic substances (HA), protein hydrolysate, plant-based products and seaweed extracts (SWE), etc. and/or microbial inoculants comprising of plant growth-promoting microbes such as arbuscular mycorrhizal fungi (AMF), fluorescent and non-fluorescent Pseudomonas, Trichoderma spp., Bacillus spp. etc. have tremendous potentiality to enhance plant growth, flowering, crop productivity, nutrient use efficiency (NUE) and translocation, as well as enhancing tolerance to a wide range of abiotic stresses by modifying physiological, biological and biochemical processes of the crop-plants. Similarly, application techniques and timing are also important to achieve the desired results. In this article we discussed the prospects of using seaweed, microbial, and plant-based biostimulants either individually or in combination for managing environmental stresses to achieve food security in a sustainable way. Particular attention was given to the modifications that take place in plant's physiology under adverse environmental conditions and how different biostimulants re-program the host's physiology to withstand such stresses. Additionally, we also discussed how application of biostimulants can overcome the issue of nutrient deficiency in agricultural lands and improve their use efficiency by crop plants.

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“…There are different routes of nano metals internalization inside plant cells and the main ones are by endocytosis, pore formation and or by a controlled release of ions (Mahakham et al, 2017;P erez-de-Luque, 2017;Ju arez-Maldonado et al, 2019;Sanzari et al, 2019). Metallic NPs have cumulative ion release compared to a constant supply of ions from their bulky counterparts.…”

Section: Introductionmentioning

confidence: 99%

Biological interaction levels of zinc oxide nanoparticles; lettuce seeds as case study

Rawashdeh

Harb

AlHasan

2020

Heliyon

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Background: Seed germination is a critical stage in plant life, and recent practices use nanomaterials for the improvement of plant seed germination indices. This study was conducted to assess the effect of laboratory prepared zinc oxide nanoparticles on the physiological and biochemical changes of lettuce seeds. Methods: Lettuce seeds were soaked in a suspension of moderately polydisperse zinc oxide nanoparticles at two different concentrations (25 ppm or 50 ppm) and shaken for 3 h at 25 C. Seeds treatment was followed subsequently by two to three days drying at ambient conditions. Treated seeds were stored for 3-4 weeks, at ambient conditions and then tested for germination in petri dishes. Germination was observed on daily basis and seedling length was measured. After imbibition and before the start of the visible germination, seeds were examined for topography and surface analysis using the scanning electron microscope and zinc uptake was measured by using the atomic absorption spectrometry and the energy dispersive X-ray. The pattern of mobilization of biomolecules was analyzed to detect any differences among different seed groups. Results: There was no loss of viability for the nanoparticles treated seeds. Indeed their germination was enhanced and their biomass increased. The activated performance of the nanoparticles imbibed seeds has been found to be correlated with an increased level of Zn inside lettuce seeds. The recorded measurements show a significant enhancement of seedling length. Interaction of zinc oxide nanoparticles with lettuce seeds mediates a variation in the biochemical processes. Changes detected in treated seeds were as following: reduced levels of the total carbohydrates (including simple saccharides and polysaccharides), higher capacity of protein synthesis, an elevated level of starch as well as an increased activity of antioxidant enzymes. Discussion and conclusion: Lettuce seeds primed with ZnO nanoparticles were found not only to maintain seed viability but even to exhibit a detectable level of germination enhancement compared to the control seeds. Overall, the promoted response of lettuce seeds during early stages of seed growth is encouraging for the application of ZnO NPs for seed priming for better germination indices.

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Nanoparticles and Nanomaterials as Plant Biostimulants

Cited by 8 publications

References 83 publications

Selenium biofortification in the 21st century: status and challenges for healthy human nutrition

Selenium biofortification in the 21st century: status and challenges for healthy human nutrition

Prospects for Abiotic Stress Tolerance in Crops Utilizing Phyto- and Bio-Stimulants

Biological interaction levels of zinc oxide nanoparticles; lettuce seeds as case study

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